Actions for Anthropogenic combustion iron as a complex climate forcer [electronic resource].

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Anthropogenic combustion iron as a complex climate forcer [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2018.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 1,593 (2,018) : digital, PDF file
Additional Creators
Pacific Northwest National Laboratory (U.S.), United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Atmospheric iron affects the global carbon cycle by modulating ocean biogeochemistry through the deposition of soluble iron to the ocean. Iron emitted by anthropogenic (fossil fuel) combustion is a source of soluble iron that is currently considered less important than other soluble iron sources, such as mineral dust and biomass burning. Here we show that the atmospheric burden of anthropogenic combustion iron is 8 times greater than previous estimates by incorporating recent measurements of anthropogenic magnetite into a global aerosol model. This new estimation increases the total deposition flux of soluble iron to southern oceans (30–90 °S) by 52%, with a larger contribution of anthropogenic combustion iron than dust and biomass burning sources. The direct radiative forcing of anthropogenic magnetite is estimated to be 0.021 W m–2 globally and 0.22 W m–2 over East Asia. In conclusion, our results demonstrate that anthropogenic combustion iron is a larger and more complex climate forcer than previously thought, and therefore plays a key role in the Earth system.
Report Numbers
E 1.99:1437039
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Note
Published through SciTech Connect.
04/23/2018.
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Nature Communications 9 1 ISSN 2041-1723 AM
Hitoshi Matsui; Natalie M. Mahowald; Nobuhiro Moteki; Douglas S. Hamilton; Sho Ohata; Atsushi Yoshida; Makoto Koike; Rachel A. Scanza; Mark G. Flanner.
Funding Information
AC05-76RL01830
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